[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: re-loading an elisp file
From: |
rusi |
Subject: |
Re: re-loading an elisp file |
Date: |
Sat, 5 Mar 2011 21:32:02 -0800 (PST) |
User-agent: |
G2/1.0 |
On Mar 6, 4:21 am, PJ Weisberg <p...@irregularexpressions.net> wrote:
> On Sat, Mar 5, 2011 at 2:17 PM, Tim X <t...@nospam.dev.null> wrote:
> > The way I usually deal with this is to either reset the variable in the
> > scratch buffer i.e.
>
> > (setq var nil)
>
> > then when I re-evaluate the buffer, var will be set if it is in a defvar
> > statement.
>
> Not true. If the variable is set at all, even to nil, defvar respects
> it and doesn't overwrite it with the default. Otherwise putting
> something like (setq flyspell-persistent-highlight nil) in your .emacs
> file would have no effect.
>
> The way to actually do that is:
>
> (makunbound 'var)
>
> -PJ
This points out the real problem -- elisp is not a functional
language.
In (pure) functional languages the pattern (for loading) is to 'clean
the slate' and then load. IOW everything -- variable, function, type
-- that was defined in this module is first 'makunbounded' and then
the module is loaded.
It would certainly be worthwhile to have such a feature in emacs. I
guess its not easy to do unless one has available the pair-list of the
form: ((var defined-in-file)...).
Another problem that would probably muddy the waters are macros...
Re: re-loading an elisp file, Pascal J. Bourguignon, 2011/03/05
Message not available
Message not availableRe: re-loading an elisp file,
rusi <=
Re: re-loading an elisp file, Le Wang, 2011/03/06
Re: re-loading an elisp file, Kevin Rodgers, 2011/03/07
Message not availableRe: re-loading an elisp file, rusi, 2011/03/07
Re: re-loading an elisp file, rusi, 2011/03/07
Re: re-loading an elisp file, David Combs, 2011/03/24
Re: re-loading an elisp file, Tim X, 2011/03/25
Re: re-loading an elisp file, David Kastrup, 2011/03/25
Re: re-loading an elisp file, Jambunathan K, 2011/03/25
Re: re-loading an elisp file, Tim X, 2011/03/25
Message not availableRe: re-loading an elisp file, Tim X, 2011/03/25